HP ProLiant DL590/64 HP Power Capping and Dynamic Power Capping for ProLiant s
HP ProLiant DL590/64 Manual
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- HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 1
and maximum power consumption for a server 6 Differences between HP Dynamic Power Capping and HP Power Capping 7 Power provisioning and Dynamic Power Capping 7 Support for Power Capping in ProLiant servers 8 Group power capping for servers through Insight Power Manager 8 Enclosure Dynamic - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 2
Using HP Power Regulator in conjunction with power capping 25 Power capping and CPU utilization 25 Summary ...26 For more information...26 Call to action ...26 - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 3
are power management features of HP ProLiant servers that operate independently of the operating system (OS) and allow system administrators to manage the power consumption of a server or group of servers. The paper outlines the use of power capping as part of a planning and provisioning strategy - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 4
Server Power Usage Base Load 13% Hard Drives 4% PCI Slots 15% Processor 33% Memory 28% Fans 7% Processor P-states Processor performance states, or P-states, provide a quick and effective mechanism for adjusting processor power consumption and performance. Both Intel® and AMD® processors support - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 5
processor power consumption. Depending on the processor model, the system BIOS can either reprogram the processor to run at a lower frequency or modulate the processor Power versus performance characteristics for a typical Intel-based ProLiant server with three P-states WWaatttss DL360 G4 Power vs. - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 6
, such as the number of options installed in the server, have a predictable and static effect on server power consumption. Other factors -- including the temperature in the data center, the activity of the subsystems (CPU, memory, disk drives and I/O) and even the mix of instructions being executed - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 7
server's power cap much more rapidly than HP Power Capping. Table 3 provides a quick architectural and operational comparison of HP Dynamic Power Capping and HP Power Capping. To avoid confusion between the two, HP ROM BIOS Firmware control of Pstate/clock throttling through processor registers - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 8
set of ProLiant servers and a larger set of ProLiant c-Class server blades. Many ProLiant G5 servers are capable of supporting Dynamic Power Capping once the appropriate BIOS and iLO firmware have been fully qualified. Please consult the most recent support matrix: http://h18004.www1.hp.com/products - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 9
) 1000 400 320 200 725 watts (Group minimum) For ProLiant ML and DL servers, group power capping apportionment works exactly the same on servers supporting Dynamic Power Capping as those supporting basic Power Capping. For server blades, there is the new and more advanced Enclosure Dynamic Power - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 10
the enclosure. The power cap lower bound is determined by adding up the total power that the server blades would use in their lowest P-state mode (typically about halfway between server idle and server maximum power), the maximum power that fans in the enclosure could draw, and the power-on power - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 11
server blades. Enclosure Dynamic Power Capping in mixed blade environments Enclosure Dynamic Power Capping is designed to operate with all server blades that support hardwarebased failsafe mechanism that immediately lowers all server blade processors to a predetermined lower power state that - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 12
groups of ProLiant ML and DL servers and supporting basic Power Capping. Servers supporting Dynamic Power Capping simply enforce the cap using the faster power management architecture. Setting a power cap for a single server Administrators can set a power cap for an individual server or server blade - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 13
In Insight Power Manager, Power Capping is located beneath the HP Power Management Actions section of the interface, as shown in Figure 6. Figure 6. Setting a power cap using Insight Power Manager 13 - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 14
Insight Power Manger is the sole tool for setting power caps for groups ProLiant ML and DL servers. Using the IPM interface, an administrator can apply a power cap to the server group that is between the minimum power and the power supply rating of the entire group. This is illustrated in Figure - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 15
enclosure to any value between the power cap lower bound and the maximum available power for the enclosure. Figure 8 shows the Power Management screen from HP Onboard Administrator. This screen is where the Enclosure Dynamic Power Cap is set. Figure 8. Setting an Enclosure Dynamic Power Cap in - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 16
of enclosures at the same time. Figure 9 shows six BladeSystem c-Class Enclosures that have been configured as a group in IPM. The blade power budget for the enclosure and to create power caps for the individual server blades. It will then continue to monitor and adjust the individual server blade - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 17
planning targets. Figure 10 shows the output from the HP Power Calculator utility for a ProLiant DL380 G5 server configured with two Quad-Core Intel Xeon X5460 3.16-GHz processors, one 72-GB disk drive, and 8 GB of system memory. The results indicate that the Total System Input power requirement - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 18
Figure 10. HP Power Calculator results for a configured ProLiant DL380 G5 server 18 - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 19
graph for a group of eight ProLiant DL380 G5 servers The peak power consumption for the server group running this particular workload is about server group could then be safely budgeted against 3116 watts of power consumed rather than against the larger maximum power number of 3384 watts that the HP - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 20
. This will have an adverse affect on the performance of those servers, especially if they support Dynamic Power Capping, since its faster monitoring will have greater impact on limiting transient peaks. HP recommends that administrators using Dynamic Power Capping review the peak power consumption - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 21
power consumption for 8 ProLiant DL580 G5 servers (based on HP Power Calculator) 3384 watts exceeding the cap, a group of servers supporting Dynamic Power Capping should only be capped HP BladeSystem c7000 enclosure fully configured with 16 server blades. Provisioning the power to the total of the HP - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 22
Peak • ≈4KW enclosure • 32 Blades per 8KW 0 Watts Using Dynamic www7.hp.com/ERC/downloads/4AA2-3107ENW.pdf part of a data center. In this situation, administrators can manually lower the power cap on a group of servers using IPM and power capping. This will quickly and efficiently lower server - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 23
will lower operating costs by decreasing average power use by the servers and, indirectly, by decreasing required cooling. To construct a applying the power cap (Figure 14). Figure 13. Setting a power cap as part of a scheduled task Figure 14. Defining the scheduled Insight Power Manager task in - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 24
close to their maximum power at roughly the same time. If this peak is too large, it may cause problems. To prevent this from occurring, it is important to manually power on these server groups in a staggered manner. In the case of auto power-up situations, this staggered power-up can be achieved - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 25
server blades. Peak power reporting and Dynamic Power Capping Both iLO 2 and IPM report the power metrics for ProLiant servers, including peak power consumption. The power monitoring system for servers most power-efficient processor P-state that matches the present workload of the server. By doing - HP ProLiant DL590/64 | HP Power Capping and Dynamic Power Capping for ProLiant s - Page 26
server blades hp.com/products/servers/management/dynamicpower-capping/support.html http://h30099.www3.hp.com/configurator/powercalcs.asp www.hp.com/go/proliant-energy-efficient http://h20000.www2.hp.com/bc/docs/support/SupportManual/c0030043 0/c00300430.pdf http://h18013.www1.hp.com/products/servers
Abstract
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3
Introduction
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3
Basics of server power control
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3
Processor P-states
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4
Clock throttling
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5
How power capping functions
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6
Maintaining power consumption below the cap
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6
Minimum and maximum power consumption for a server
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6
Differences between HP Dynamic Power Capping and HP Power Capping
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7
Power provisioning and Dynamic Power Capping
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7
Support for Power Capping in ProLiant servers
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8
Group power capping for servers through Insight Power Manager
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8
Enclosure Dynamic Power Capping
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9
Elements of an enclosure power cap
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9
Enclosure Dynamic Power Capping operation
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10
Active power reallocation
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11
Enclosure Dynamic Power Capping in mixed blade environments
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11
Opting out servers
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11
Setting power caps for servers
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12
Setting a power cap for a single server
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12
Setting a power cap for a group of servers
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14
Setting an BladeSystem enclosure power cap
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15
Setting a power cap for a group of enclosures
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16
Using power capping in data center provisioning
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17
Choosing effective power caps
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17
Power capping to peak power consumption
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19
Power capping to average power consumption
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21
Using Enclosure Dynamic Power Capping in power provisioning
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21
Additional uses for power capping
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22
Power capping for emergency management
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22
Time-of-day power capping
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23
Subtleties of power capping
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24
Avoiding power capping conflicts within groups
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24
Powering-up groups of servers when using Dynamic Power Capping
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24
Setting low or unattainable power caps on servers
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24
Peak power reporting and Dynamic Power Capping
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25
HP Power Capping and HP Dynamic Power
Capping for ProLiant servers
technology brief, 2
nd
edition